The Dana Dolly Portable Dolly System Rental Kit with universal track ends is a heavy-duty camera dolly platform that rides on 16 custom-modified soft polyurethane wheels that resist flat spotting and use ABEC-7-rated precision bearings providing you with extremely smooth dolly shots. This kit is complete with 75, 100, and 150mm bowl adapters, and comes in a custom flight case. The wheel trucks swivel, allowing the dolly to ride on available straight or curved tracks, which you must source separately. The manufacturer recommends using standard-speed rail or Schedule 80 aluminum pipe of compatible size. The dolly includes two universal track ends, which accept inch and a quarter pipe (standard speed rail) up to 1.9" O.D., and fit into available standard Junior stand receivers or 5/8" baby pins. A center support is included for long track runs or when using heavy cameras.